Install UE4 on E:/

My disk space is too low to install UE4 on my laptop, so I want the engine on my flash drive. I have already tried to install the launcher itself on my flash drive but I wasn’t allowed to chose E:/ as my destination. I know this is possible as I have done it with many other programs. I do not understand why I cannot do it for this or why I cannot locate a download location in any of the config files. My device drive is only 22GB and I have exactly 11.9GB left and my device is completely free of all data of mine. I am running windows 7 on a lenovo laptop. This is only temporary until I get a replacement desktop.

There is plenty of them (because I’ve seen them and used them, lol), but not all programs/software can be installed on a flash drive. Software like UE4, 3Ds Max, Adobe products, etc. are extensively tied to the operating system. Loads of registry files, core OS files that need to be present and persistent, system services and other things all play a role in how a piece of software functions. You could theoretically copy these files over to the flash drive but they won’t work the way you want them to do to how the the software and OS interact with each other.

Thanks man. How about an extra HDD? Do you think that would work?

Another hard drive would work with no problem (I have everything UE4 related installed on an SSD which I have mounted as H:\ while my OS which is Windows is on a HDD as the normal C:).

Although flash drives and hard drives do the exact same things (meaning they store data) they don’t exactly work the same. The operating system knows that flash drives are removable and also knows that it shouldn’t use flash drives as the storage medium for software because software can be extensively tied to the OS as explained earlier.

Using mklink will solve all your problems here.

http://www.sevenforums.com/tutorials/278262-mklink-create-use-links-windows.html